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Optimization of a DoD Print Head Signal for the Ink-Jetting of Conductive Circuits

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The inkjet-printing principle is becoming more and more important for electronical applications. Printing conductive circuits is possible with colloidal inks so far, but stability of the printing process is not guaranteed at all times.

The piezo activation signal, meaning its shape, strength and duration influences the droplet formation process and printing stability enormously. The droplets' velocity and volume can vary from 1 to 6 m/s and 100 to 300 pL respectively for a 100 μm nozzle print head. Small droplets are desired for highest resolution, but they depend on the piezo activation signal u(t). Furthermore, the stability of the printing process is influenced by the energy provided to the droplet.

By means of a frequency response analysis of the print head, new shapes of u(t) are generated and tested practically. The influences of different piezo signals on the printing process are shown by measuring volume and velocity of the generated stable droplets. The article shows a method of optimizing a piezo activating signal to gain accuracy and resolution for inkjet printed electrical circuits.

Document Type: Research Article

Publication date: 2008-01-01

More about this publication?
  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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